Friction and adhesion of fluorine containing hydrophobic hydrogenated diamond-like carbon (F-H-DLC) coating against magnesium alloy AZ91

被引：37
作者：
Bhowmick, S. [1 ]
Sen, F. G. [1 ]
Banerji, A. [1 ]
Alpas, A. T. [1 ]
机构：
[1] Univ Windsor, Dept Mech Automot & Mat Engn, Windsor, ON N9B 3P4, Canada
来源：
SURFACE & COATINGS TECHNOLOGY | 2015年 / 267卷
关键词：
Diamond-like carbon; Fluorine; Hydrophobicity; Adhesion; Friction; TEMPERATURE TRIBOLOGICAL BEHAVIOR; AUGMENTED-WAVE METHOD; ELECTRONIC-STRUCTURE; RECENT PROGRESS; ALUMINUM-ALLOY; COATED DRILLS; SLIDING WEAR; FILMS; SURFACES; LUBRICATION;
D O I：
10.1016/j.surfcoat.2014.11.047
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Tribological tests were performed on hydrogenated diamond-like carbon (H-DLC) and F containing H-DLC (F-H-DLC) coatings sliding against a magnesium alloy (AZ91) in air with relative humidity (RH) ranging between 0% and 75%. Pin-on-disk type friction tests typically exhibited high running-in COF, followed by a steady state regime with a low and constant coefficient of friction (mu(S)). At 32% RH both the F-H-DLC and the H-DLC showed similar friction behavior, but mu(S) of H-DLC increased with an increase in RH while mu(S) of F-H-DLC decreased. Carbonaceous transfer layers were formed on the AZ91 surfaces and incorporated F transferred from F-H-DLC. The transfer layers were passivated by OH molecules, as detected by the Fourier transform infrared and micro-Raman spectroscopy. A first principles interface model that examined the hydrophobic interactions between F and OH terminated diamond (111) surfaces showed that high repulsive electrostatic forces would contribute to low friction in high humidity atmospheres. (C) 2014 Elsevier B.V. All rights reserved.
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页码：21 / 31
页数：11
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